GMC Complaints

The contact owns a 2018 GMC Sierra 1500. The contact stated while driving approximately 35 MPH with the rear window defroster activated, there was a burning rubber odor inside the cabin of the vehicle and there was smoke coming from the rear window area. While inspecting the rear window the contact discovered that the rear window connector cover had melted, and the wire connections were a burning amber color, but no flames were present. After disconnecting the electrical connections, approximately 30 seconds later the rear glass panel on the passenger side suddenly shattered. No injuries were reported. The contact’s young daughter was seated in the rear during the failure. The vehicle was taken to the local dealer, but the cause of the failure was not yet determined. The manufacturer was not notified of the failure. The failure mileage was 60,952.

https://gmauthority.com/blog/2025/01/nhtsa-opens-investigation-regarding-gm-6-2l-v8-engine-failures/ I experienced an engine failure, similar to the ones that are currently being investigated by NHTSA on my 2022 GMC Sierra Denali. My safety was put at risk through the engine failure at high speeds on the highway. The engine failed and while driving through mountainous terrain, the vehicle automatically launched into neutral and I had to dodge several passing vehicles to get to a safe place on the side of interstate 40 in western NC. The problem was confirmed by the original dealership that I purchased the vehicle from. Randy Marion GMC in Huntersville NC. There were no warning lamps, messages or other symptoms prior to the incident. It was sudden and without warning.

Engine Coolant Low error constantly appears. GM Service provider states that engine coolant level is fine, but sensor may be defective.

1st time Complete failure on my 2024 engine without warning. As I was traveling on the interstate. All of sudden, I lost all power. Mt truck started slowing down on its own. It was very difficult getting out of the way of on coming traffic. Dealership replaced values. 2 months later. Again on the Interstate engine complete failure again. Now take it to dealership. This time I heard a ticking noise. Right after the ticking noise. Engine stop working. Same situation. Trying to get out of the way of traffic. I was stranded over 3 hours.

Relatively uneventful ownership history for new 2022 Yukon XL Denali purchased April 2022. Yesterday, started noticing knocking noise from engine. On way to dealership today, the engine died on the interstate without any warning messages and the vehicle ultimately stopped in the middle of the road off of the exit with my 3 young children on board. Dealership indicates that engine died and will need to be replaced. They stated that 3 other vehicles on the lot with the same issue.

The contact owns a 2022 GMC Sierra 1500. The contact stated while driving at approximately 30 MPH, the vehicle stalled; the vehicle failed to return to normal operation. No warning light was illuminated. The vehicle was towed to a dealer where it was diagnosed that the engine needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure. The failure mileage was approximately 18,000.

Engine failure. The engine was replaced once before I bought it at around 17k miles and then I had to replace that one around 44k miles.

I WAS DRIVING MY CAR MONDAY AND I ALMOST CRASH WITH THE CAR IN FRONT OF ME THE BRAKES DOESNT WORK AND THEN IN THE PANEL START LIGHTS OF THE ENGINE THE SUPENSION LIGHT AND SIGH SAYING BRAKE ASISTANT, THE CAR IS PARK BECAUSE THE BRAKES AND I LOOK FOR RECALLS AND I CALL GMC AND THEY SAYS THAT I DONT HAVE ANY RECALL BUT I ALMOST DIE MONDAY BECAUSE THE VACUM PUMP FOR THE BRAKES FAIL AND ALL THE LIGHTS IN THE PANNEL START LIGHT UP.

My check engine light came on so I stopped at a dealership to have it checked out. The dealership in Louisiana said it just needed to be updated. So I made the trip to Laredo, Texas to go to work. The next day the truck went into reduced acceleration and nearly caused me to wreck on the interstate. I had the vehichle towed to the closest GMV dealership. It turns out these vehicles have a faulty engine coolant control valve. The part is on national back order with no ETA. GMC is knowingly allow their customers to operate the trucks with this part that is know to fail. I am currently stranded in South Texas and I will have to purchase a rental vehicle to get back home to Louisiana. GMC will not help me at all with this situation.

On or about September 28 while traveling N on US 67 it was necessary to stop at a construction stop light. As I started to accelerate a pinging started. I continued roughly 10 miles, to my daughters house. The truck was flat bedded back to Jones Auto Center in Monmouth Ill. The found a bent push rod and bad lifter in the #1 Cyl. Repairs were done per the attached Invoice. Milage was 103,000. On 11/5/2024 while traveling on US 116 @ 65+-MPH the engine froze, with instant stoppage. Flatbedded to Myler Automotive where the engine was replaced per the attached Invoices. Milage was 105907.